All the transitions of the HCN isotopologues and most of the transitions of the HNC isotopologues present in the spectral range of ASAI, between 72 and 272 GHz, were detected towards the shock region (see Table 1). Due to instrumental (spectral bandwidth) and observational (rms noise) limitations, only the ground state transitions of HN\(^{13}\) C and H\(^{15}\) NC were detected with
a SNR \(>\)  3. The profiles of the transitions display broad linewidths (up to \(\approx 10\hbox{\hspace{1.99997pt}km\hspace{1.99997pt}s$^{-1}$}\) ).
All the line profiles peak at \(V_{lsr}\approx 0\hbox{\hspace{1.99997pt}km\hspace{1.99997pt}s$^{-1}$}\)  and trace blueshifted gas, in agreement with the other molecular tracers reported in previous works [1]}, [2]}, [3]}.
